Housing for impact breaking or crushing machines



p 13, 1951 G. H. PATTINSON 2,568,203

HOUSING FOR IMPACT BREAKING OR CRUSHING MACHINES Filed June 10, 1949 Invenior Attorney Patented Sept. 18, 1951 HOUSING FOR. IMPACT snneigmoononusnme MAGHINES George H..Pat tinson, Staines,1England --ApplicationJune 0, 1949, Serial No. 98,352

In Great Britain March 24, 1947 The present invention relates tomachines for breaking up or crushing stone, gravel, clinker, slag andlike material by impact, and concerns those of the rotary-type wherein arotor having a series of radial hammers pivoted thereon revolves withina housing having a roughened or ribbed interior anvil-like surfaceagainst which the material to be broken or granulated by impact isthrown by the heads of the revolving hammers.

It is the object of the present invention to provide an improved housingfor a machine of the kind referred to, in which provision is made ofmeans for reducing to a minimum wear and tear of the anvil-like surface.That is to say the material itself which is crushed or broken by theheads of the hammers is utilised to protect the anvil-like surface inthe interior of the housing.

In order that the present invention may be clearly understood andreadily carried into efiect, an impact breaker made in accordancetherewith will now be described, by way of example, with reference tothe accompanying drawings, in which Figure 1 shows a longitudinalsectional elevation of the machine, and

Figure 2 is a section on the line 2, 2 of Figure 1.

Referring to the drawing, l denotes in general the housing of a machinefor breaking up or crushing stones, gravel, clinker or the like, inwhich housing is rotatably mounted a rotor carrying one or more pivotedhammers, one form of which is shown and described in British patentspecification No. 489,678. The precise construction of the hammer rotoris not material to the present invention and accordingly theconstruction of the hammer rotor, which is indicated diagrammaticallygenerally by reference numeral 2, will not be described herein. Thematerial is fed into the hopper 3 where the hammer heads in theirrevolutions with the rotor 2 impact the material against that portion ofthe internal surface of the housing I which embraces the descendingportion of the rotor which lies approximately on one side of a verticalline passing through the centre of rotation of the rotor 2 and above ahorizontal line passing through the same centre, the rotor 2 beingconsidered as rotating in an anti-clockwise direction.

The anvil or striking surface of the housin or casing consists of anumber of attritionresistant blocks 4 made of manganese or othersuitable steel. Ihese blocks 4 are mounted side by side in the mannershown to form a station- 1 Claim. (Cl. 241F285)- aryarchaving its centreof curvature located at theaxis of rotation of said rotor 2. Each blockis reducedatt at-each end (FigureZ) and provided with holes .6 throughwhich bolts or rivets may pass for securing th blocks 4 to the housing Ias shown in Figure 2.

The blocks 4 are specially shaped at their sides (as shown in Figure 1)so that when they are placed side to side they form an arcuately shapedmember.

Blocks ta, ib, ie and 4d (hereinafter termed anvil-blocks) arepractically identical in size and shape and are provided withlongitudinal recesses B of substantially semi-circular shape in crosssection, the opening of each recess being substantially equal to thewidth of the housing 1.

Between each of the afore-mentioned blocks as shown in Figure 1, blocks4e, 4;, 4g and 4h, practically identical to each other, are mounted.These blocks are also provided with centrally located set-backlongitudinal recesses 9, which are disposed level with the outer lips ofthe adjacent circumierentially spaced anvil-blocks.

A special shaped block ii is provided at the top of the housing orcasing to join the standard type of lining block Ill of the casing I,said block 42' being provided with a special shaped recess l I. It maybe necessary to provide further blocks similar to blocks 4e, 4 4g and 4hin order to complete the arcuate striking surface of the casing.

From Figure 1 it will be seen that when the blocks are assembledtogether the recesses 8 present substantially horizontal transverselydisposed shelf portions and that the recesses 8 match with the recesses9 to form circumferentially spaced surface on the housing wall. Thesides I2 of the blocks ia, 41), 3c and 4d are inclined so that when thematerial is thrown from the hammers against the striking surface theseinclined sides I2 direct the material into the cavities, in which aquantity of the material is retained, so that as the process continuesand further material is thrown against the striking surfaces of theblocks, the surfaces are protected by the material initially retained inthese cavities. Undue wear on these striking surfaces of the blocks isthus prevented as th material itself takes the impact.

The invention is not limited to the precise forms or details ofconstruction described, as these may be varied to suit particular cases.For example, the recesses 8 need not be. of part circular cross sectionas shown, but may be of any convenient shape.

What I claim is:

A housing for an impact breaking or crushing machine of the kindcomprising a housing within which is rotatabiy mounted a rotor having anumber of pivoted hammers thereon, said housing having a portion of theinterior wall thereof of arcuate formation with the centre of curvaturelocated at the axis of rotation of the rotor to be used therein, andsaid arcuate wall portion being composed of a series ofcircumferentially spaced attrition-resistant anvil blocks which areseparated circumferentially by at least one plain surfaceattrition-resistant spacer block beyond the inner face of which spacerblock the adjacent anvil blocks inwardly radially project, each anvilblock having that side of the projecting portion thereof which faces inthe direction of approach of the hammers of the rotor to be used in saidhousing formed with a recess presenting a horizontal transverselydisposed shelf for retaining a layer of crushed or broken material, theopening of said recess being substantially equal to the width of thehousing, and the inner face of each of said spacer blocks being formedwith a centrally located set-back surface disposed as a smoothcontinuation of the radially outermost portion of said opening of therecess in the anvil block which faces toward said spacer block.

GEORGE H. PATTINSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 100,302 Lyons Mar. 1, 18701,144,102 Brainard June 22, 1915 1,166,698 Lincoln Jan. 4, 19161,753,437 Lykken Apr. 8, 1930 2,012,694 Runyan Aug. 27, 1935 2,294,921Lykken Sept. 8, 1942 FOREIGN PATENTS Number Country Date 388,337 GreatBritain Feb. 23, 1933 318,697 Italy June 18, 1934

